“…The principle of overload was addressed by 11 out of 20 aerobic [ 5 , 30 , 35 , 37 , 39 , 42 – 45 ] (55%), 11 out of 16 resistance [ 46 , 48 – 50 , 52 , 53 , 55 , 57 , 58 , 60 , 61 ] (68.8%) and 12 out of 22 combined [ 67 – 72 , 75 , 77 , 79 ] (54.5%) trials. For seven aerobic [ 29 , 31 , 33 , 34 , 36 , 40 , 41 ] (35%) and six combined [ 62 – 66 , 76 ] (27.3%) interventions, the compliance with this principle was unclear.…”